NOPALEA. 



37 



30. Nopalea gaumeri sp. nov. (See Appendix, p. 216.) 



4. Nopalea auberi (Pfeiffer) Salm-Dyck, Cact. Hort. Dyck. 1849. 64. 1850. 

 Opuntia auberi Pfeiffer, Allg. Gartenz. 8: 282. 1840. 

 Often 8 to 10 meters high, with a cyhndric, jointed trunk, never very spiny, but the areoles 

 bearing tufts of brown glochids; branches often at right angles to the stem; joints narrow, thick, 

 3 dm. long, bluish green and glaucous; areoles circular, about 2 mm. broad, bearing short white wool 

 and later a tuft of brown glochids; spines, when present, i or 2, subulate, the upper one about twice 

 as long as the other, white or nearly so, with brownish tips, the longest one 2 to 3 cm. long; flowers 

 from base of ovary to tip of style about 9 cm. long; petals erect, closely embracing the stamens, 

 rose-pink, ovate-lanceolate, acuminate, 2 to 3.5 cm. long; filaments 12 to 15 mm. longer than the 

 petals, white below, but the exposed parts pinkish; anthers dehiscing before maturing of stigma; 

 style stout, light pink with a large, white, circular disk just above the constricted base; stigma- 

 lobes green ; ovary 4 cm. long, with low but very distinct tubercles and a deep umbilicus, its areoles 

 bearing many brown glochids, these sometimes 10 mm. long. 



Type locality: Erroneously cited as Cuba. 



Distribution: Central and southern Mexico. 



Illustration: Addisonia i : pi. 10. 



Plate IV, figure 2, represents a flowering joint of a plant obtained by W. E. Safford at 

 Guadalajara, Mexico, in 1907; figure 3 shows young fruit of the same plant; plate v is 

 from a photograph taken by Dr. MacDougal near Mitla, Mexico, in 1906. 



5. Nopalea dejecta Salm-Dyck, Cact. Hort. Dyck. 1849. 64. 1850. 



Opuntia dejecta Salm-Dyck, Hort. Dyck. 361. 1834. 



Plant I to 2 m. high, with a definite trunk, very spiny, the old areoles often bearing 6 or 8 spines ; 

 joints narrow, 10 to 15 cm. long, only moderately thick, often drooping, bright green even in age, 

 bearing usually two somewhat spreading spines at an areole ; spines at first pale yellow or pinkish, 

 in age gray, the longest 4 cm. long; flower, including ovary and style, 5 cm. long; sepals obtuse; petals 

 erect, dark red; stamens long-exserted, dark red. 



Type locality: Erroneously cited as Havana, Cuba. 



Distribution : Common in cultivation in tropical America ; perhaps native in Panama. 

 Opuntia diffusa and 0. horizontalis are both given by Pfeiffer (Enum. Cact. 159. 

 1837) as synonyms of this species. 



